add default impl for some list member functions

fix inserting via iterator correctly increases element count

close feature branch feature/tree_add

merge feature/tree_add branch

rework cx_tree_add() API to allow insertion of edge nodes feature/tree_add

remove condition that is always false after recent fix feature/tree_add

(0) -300 -100 -30 -10 -6 +6 +10 tip

mercurial